1335391 九、發明說明： 【發明所屬之技術領域】 本發明係為—種滾珠螺桿，尤指—種具可調整顧力 之滾珠螺桿。 【先前技術】 -般滾珠螺桿因加卫誤差，常造成螺帽、螺桿及滾動 件之間產生間隙’此間隙即為業界所稱的背隙，但是當滚 珠螺桿使用在高精密度的機台上時，螺桿以正轉帶動^ 的仃耘以及螺桿以反轉帶動螺帽的行程，會因螺帽、螺桿 及;袞動件二者間有背隙而造成螺帽行程的誤差，這對追求 咼精密度的機台來說，是個很嚴重的問題，為此市面上便 出-種消除背隙誤差的結構，其提供—預壓力把螺帽 固定向單-方向推抵，如此便能夠使螺桿螺牙、螺帽螺紋 與滚動件相互抵觸，解決了滾珠螺桿背隙的問題，不過此 種結構往往只能提供螺帽固定的預壓力，沒辦法因應需要 進行預壓力的調整；所以還是有改進的空間。 再者，一般具預壓力之滾珠螺桿如第一圖所示，該滾 珠螺桿係具有兩螺帽1Α、2Α，該兩螺帽以、2 = 間係具有一預壓片3Α ’其三者係藉由滾動體（未 1335391 為介質穿設於螺桿0 A上，而此習知的預屋結構於製程上 相當繁靖且不具謂整預塵力之功能，其製程說明如了 ·· 1.將兩螺帽i A、2 A與預壓片3 A穿設於螺桿 後，將所預訂的預塵力調整好後，以膠帶黏貼於兩螺 帽1A、2A與龍片3A三者之外緣，以防业預虔 力消失。 、 2.再者，將兩螺帽1 A、2A與預壓片3A之間加工一 鍵乜 11A、21A、31A ’ 該鍵槽 =、31A因與鍵4八須為緊密配合’才能使滾珠螺 桿具有穩定的預壓力，故該鍵槽丄丄A、2丄A、3 1A的平行度需十分講究，如發現有誤差則需重新加 工’如無重新加工就進行組褒，則會造成鍵4Α轉 槽11A、21A、31A相互受力不均而鬆脫，故 如解決此加工問題則會使加工成本大幅降低。 【發明内容】 本發明人 之目的之發明誕 基於上述f知預壓力之滾， 經過研究改良後，終有確能達成以下發明^ 生。 ^35391 即’本發明首要目的在於’設計一具可調整預壓纟士構 之滾珠螺桿。 本發明另一目的在於，使具有預壓力之滾珠螺桿製程 更為簡單以降低製造成本。 、為達上述之目的，本發明係為一種具可調整預壓力之 滾珠螺桿，其包含： 一長軸，其外緣設有一螺紋槽； ^ 帛一螺帽’係穿設於該長軸，該第一螺帽内設有一 f置孔及一第一穿孔，該容置孔係與該第-穿孔相連通， 。亥第-穿孔内緣係設有—相對該敎槽之第—螺紋溝，且 於該第一穿孔兩端各設有 ^ 有弟一疋位槽，於該第一定位槽 間故有連通制m槽之第-迴流孔； 螺中目，係裝設於該第—螺帽之容置孔中並且穿 二:長軸’該第二螺帽於-外端設有-環狀之凸塊另於 内部设有一第二穿;，^ π 一 由 °Λ塊外緣係設有一外螺紋，該第 第—η 相對该螺紋槽之第二螺紋溝，且於該 設有連通該兩第二定位槽’於該第二定位槽之間 乐&位槽之第二迴流孔； 若干滾動件，係介 、忒苐一螺紋溝與螺紋槽及該第二 螺紋溝與螺紋槽之間； ㈣銜接於第二螺帽上之迴流元件的迴流道之兩端 係人》亥第一迴流孔及第二螺紋溝之兩端銜接，使第一螺紋1335391 IX. Description of the invention: [Technical field to which the invention pertains] The present invention relates to a ball screw, and more particularly to a ball screw having an adjustable force. [Prior Art] - The ball screw has a gap between the nut, the screw and the rolling element due to the adjustment error. This gap is known as the backlash in the industry, but when the ball screw is used in a high-precision machine. When it is up, the screw rotates the 仃耘 of the screw and the screw to reverse the stroke of the nut, which may cause the error of the nut stroke due to the backlash between the nut, the screw and the swaying part. For the machine that pursues precision, it is a very serious problem. For this reason, a structure for eliminating the backlash error is provided on the market, which provides - the pre-pressure pushes the nut to the single-direction, so that The screw thread, the nut thread and the rolling piece are mutually in contact with each other, which solves the problem of the backlash of the ball screw. However, such a structure can only provide the pre-pressure fixed by the nut, and there is no way to adjust the pre-pressure according to the need; There is still room for improvement. Furthermore, the ball screw generally having a pre-pressure is as shown in the first figure. The ball screw has two nuts 1 Α, 2 Α, and the two nuts have a pre-compression piece 3 间 ' By means of rolling elements (not 1335391 for the medium to be threaded on the screw 0 A, and this conventional pre-housing structure is quite versatile in the process and does not have the function of pre-dusting force, the process description is as follows. After the two nuts i A, 2 A and the pre-compression piece 3 A are placed on the screw, the predetermined pre-dusting force is adjusted, and the tape is adhered to the two nuts 1A, 2A and the dragon piece 3A. The edge is to prevent the industry from disappearing. 2. In addition, a key is processed between the two nuts 1 A, 2A and the pre-compression piece 3A 乜 11A, 21A, 31A 'The key groove =, 31A factor and key 4 The eight-bearing must be tightly matched to make the ball screw have a stable pre-pressure. Therefore, the parallelism of the keyway 丄丄A, 2丄A, and 3 1A needs to be very particular. If any error is found, it needs to be reworked'. If the group is twisted, the key 4 turns, the grooves 11A, 21A, and 31A will be loosely displaced from each other, so that the processing cost is solved if the processing problem is solved. [Description of the Invention] The invention of the present invention is based on the above-mentioned f-pre-pressure roll, and after research and improvement, the following invention can be finally achieved. ^35391 That is, the primary object of the present invention is to design one. The ball screw with adjustable preloading gentleman's structure. Another object of the invention is to make the ball screw process with pre-pressure simpler to reduce the manufacturing cost. For the above purpose, the invention is an adjustable The pre-pressure ball screw comprises: a long shaft, the outer edge of which is provided with a thread groove; ^ a nut is threaded on the long shaft, the first nut is provided with a f hole and a first The perforation, the accommodating hole is connected to the first perforation, and the inner edge of the perforation is provided with a first thread groove corresponding to the groove, and each of the two ends of the first perforation is provided with a brother a 槽 position slot, between the first locating slots, there is a first-return hole that communicates with the m-slot; the snail center is installed in the accommodating hole of the first nut and wears a long axis: the first axis The second nut is provided at the outer end - a ring-shaped bump and a first inner portion Wearing a thread, the outer edge of the block is provided with an external thread, the first -n is opposite to the second thread groove of the thread groove, and the second positioning groove is connected to the second Locating a second return hole between the groove and the groove; a plurality of rolling members, between the thread groove and the thread groove and the second thread groove and the thread groove; (4) engaging the second nut The two ends of the return flow path of the reflow element are connected to each other by the first return hole and the second thread groove, so that the first thread
右干迴流疋件，係分別裝設於該第一定位槽及第二定 位=其㈣—迴流道。襄設於第—螺帽上之迴流元件的 、机道之兩端係分別與該第一迴流孔及該第一螺紋溝之 溝及第二螺紋溝形成—㈣之迴路，提供該滾動件益限循 環用。 凋正件，其内緣設有與該凸塊之外螺紋相對之内螺 紋，藉由該内螺紋與外螺紋相互螺合，使該調整件可螺設 於該第二螺帽之凸塊’該調整件外緣係設有若干提供手工 具嵌設之凹槽，以方便使用者調整預壓力。 紅所上述，該第二螺帽係設於該第一螺帽之容置孔 中，且該第二螺帽之凸塊係可部份外露或完全外露於該第 —螺帽外端面’藉由完全（或部分）外露之凸塊之外螺紋 與调整件之内螺紋相互螺合，並將該調整件之内側端面螺 鎖至抵觸到第—螺帽之端面後，就會使兩螺帽（指第—螺 帽及第二螺帽）内部之滾動件分別與第—螺紋溝及螺紋槽 和第二螺紋溝及螺紋槽產生預壓力，如該調整件再向第一 螺帽之方向鎖入時，所產生的預壓力則越大，如該調整件 丄335391 反向表、脫時，則產生的預壓力則越小。 故本發明可以方便使用者調整滾珠螺桿的預壓力，且 L私滾珠螺桿裝没於機台上時，螺帽都會套設於機台之套 内如將凋整預麼力之機構設於螺帽外緣，當使用者欲 調整預麗力時，因螺帽外緣被隱藏於該套桶内，並無法順 利調整預壓力，還需將滾珠螺桿拆離機台後方能順利調整 預壓力，而本設計顧慮到此問題，特別將調整件設計於螺 帽端部使滾珠螺桿安裝後調整件依然裸露於外部，方便使 用者調整’故本設計實在相當具有實用性。 另外本發明所有構件都是獨立製造加工，然後再進行 組裝，改善習知技術需將兩螺帽與預壓片三者裝配後再進 仃加工，所以本發明之設計並縮短滾珠螺桿裝配時間，且 不會有預壓力消失的問題（因本發明之設計可隨時調整預 屋力），使製造成本降低。 -為了更進一部瞭解本發明之特徵及技術内容，請參閱 -以下有關本發明之實施方式說明及圖式’然而此實施方式 及圖式僅供說明及參考用，而非用以對本發明做任何限制 者0 1335391 【實施方式】 請參閱第二圖至第十圖所示，本發明係為一種具可 調整預壓力之滾珠螺桿，其包含： 一長軸0 ’其外緣設有一螺紋槽〇 1 ; 一第一螺帽1，係穿設於該長軸〇，該第一螺帽1内 設有一容置孔1 1及一第一穿孔1 2，該容置孔1 1係與 該第一穿孔1 2相連通，該第一穿孔1 2内緣係設有一相 對該螺紋槽0 1之第一螺紋溝1 2 1，且於該第一穿孔1 2兩端各設有一第一定位槽1 2 2，於該第一定位槽1 2 2之間設有連通該兩第一定位槽1 2 2之第一迴流孔1 3 ； 一第二螺帽2，係襞設於該第一螺帽1之容置孔1 1 中並且穿設於該長軸0，該第二螺帽2於一外端設有一環 狀之凸塊2 1另於内部設有一第二穿孔2 2，該凸塊2丄 外緣係設有一外螺紋2 1 ，該第二穿孔2 2内緣係設有 一相對該螺紋槽〇 1之第二螺紋溝2 2 2 ,且於該第二穿 孔2 2兩端各設有一第二定位槽2 2 2，於該第二定位槽 2 2 1之間設有連通該兩第二定位槽2 2丄之第二迴流 孔（未顯示）； 若干滾動件X，係介於該第一螺紋溝丄2丄與螺紋槽 0 1及該第二螺紋溝2 2 2與螺紋槽〇 1之間； 若干迴流元件4，係分別裝設於該第一定位槽i 2 2 及第一定位槽2 2 1 ’其設有一迴流道（未顯示）。裝設 於第一螺帽1上之該迴流元件4的迴流道（未顯示）之兩 端係分別與該第一迴流孔1 3及該第一螺紋溝1 2 1之 兩端銜接，裝設於第二螺帽2上之該迴流元件4的迴流道 (未顯示）之兩端係與該第二迴流孔（未顯示）及第二螺 紋溝2 2 2之兩端銜接，使第一螺紋溝1 2 1及第二螺紋 溝2 2 2形成一封閉之迴路，提供該滾動件X無限循環 用。 一调整件3，其内緣設有與該凸塊2 1之外螺紋2 1 1相對之内螺紋3 1，藉由該内螺紋3 1與外螺紋2 ^^相 互螺合，使該調整件3可螺設於該第二螺帽2之凸塊2 1，该§周整件3外緣係設有若干提供手工具嵌設之凹槽3 2，以方便使用者調整預壓力。 以上所述為各元件細部說明及其相互搭配關係，以 下說明本實施例之實施方式： 清參閱第九、十圖所示，該第二螺帽2係設於該第一 ，帽1之容置孔11中’且該第二螺帽2之凸塊21係可 九全外露（如第九圖所示）或部份外露（如第十圖所示） 於。亥第-螺帽1外端面’藉由完全（或部分）外露之凸塊 1335391 2 1之外螺紋2 1 1與調整件3之内螺紋3 i相互螺 合，並將該調整件3之内側端面螺鎖至抵觸到第一螺帽工' 之端面後，而使第二螺帽2產生—拉力F，就會使兩螺目帽 (指第一螺帽及第二螺帽）内部之滾動件χ分別與第一螺 紋溝1 2 1及螺紋槽Q 1和第二螺紋溝2 2 2及螺紋槽 0 1產生㈣力，如該調整件3再向第一螺帽i之方向^ 入時，所產生的預壓力則越大，如該調整件3反向鬆脱 時’則產生的預壓力則越小。 綜所上述，本發明為了使方錢用者娜滾珠螺桿的 預壓力，特別將調整結構設計於螺帽之端 裝設於機台後仍可輕鬆調整賴力，且改善習知 調整預壓力之問題點，所以本發明之『具有產業之可利用 性』應已毋庸置疑，除此之外，在本案實施例所揭露出的 特徵技術，於申請之前並未曾見於諸刊物，亦未曾被公開 使用’不但具有如上所述功效增進之事實，更具有不可輕 忽的附加功效’是故，本發明的『新賴性』以及『進步性』 •都已符合專利法規m提出發明專利之申請，祈請惠』 -予審查並早日賜准專利，實感德便。 以上所述實施例之揭示係用以說明本發明，並非用以 1335391 限制本發明，故舉凡數值之變化與等效元件之置換，仍應 隸屬本發明之範嘴。The right dry reflow element is respectively installed in the first positioning groove and the second positioning = (4) - return path. The two ends of the recirculation element disposed on the first nut are respectively formed with the first return hole and the groove of the first thread groove and the second thread groove - (4), providing the rolling element Limited to use. The inner edge of the positive member is provided with an internal thread opposite to the external thread of the protrusion, and the internal thread and the external thread are screwed together, so that the adjusting member can be screwed on the protrusion of the second nut. The outer edge of the adjusting member is provided with a plurality of grooves for providing a hand tool to facilitate the user to adjust the pre-pressure. In the above, the second nut is disposed in the receiving hole of the first nut, and the protrusion of the second nut may be partially exposed or completely exposed on the outer end surface of the first nut. When the outer thread of the completely (or partially) exposed bump is screwed with the internal thread of the adjusting member, and the inner end surface of the adjusting member is screwed to the end surface of the first nut, the two nuts are The rolling elements inside (the first nut and the second nut) respectively generate pre-pressure with the first thread groove and the thread groove and the second thread groove and the thread groove, and if the adjusting member is locked to the direction of the first nut When entering, the pre-pressure generated is larger. If the adjustment member 丄335391 is reversed and off, the pre-pressure generated will be smaller. Therefore, the present invention can facilitate the user to adjust the pre-pressure of the ball screw, and when the L private ball screw is not mounted on the machine table, the nut will be set in the sleeve of the machine, and the mechanism for squeezing the pre-force is set in the snail. When the user wants to adjust the pre-stress, when the outer edge of the nut is hidden in the barrel, and the pre-pressure cannot be adjusted smoothly, the ball screw can be detached from the machine to adjust the pre-pressure smoothly. The design is concerned about this problem, especially the adjustment member is designed at the end of the nut so that the adjustment member is still exposed to the outside after the ball screw is installed, which is convenient for the user to adjust. Therefore, the design is quite practical. In addition, all the components of the present invention are separately manufactured and processed, and then assembled, and the prior art is required to assemble the two nuts and the pre-compacting sheet, and then the processing of the present invention shortens the assembly time of the ball screw. There is no problem that the pre-pressure disappears (the pre-house force can be adjusted at any time due to the design of the present invention), and the manufacturing cost is lowered. In order to further understand the features and technical contents of the present invention, please refer to the following description of the embodiments of the invention and the drawings. However, the embodiments and drawings are for illustrative purposes only and not for the purpose of the invention. Any restriction 0 1335391 [Embodiment] Referring to Figures 2 to 10, the present invention is a ball screw having an adjustable pre-pressure, comprising: a long shaft 0' having a thread groove on its outer edge A first nut 1 is disposed in the long shaft, and the first nut 1 is provided with a receiving hole 1 1 and a first through hole 12, and the receiving hole 11 is coupled to the first nut 1 The first through hole 12 is connected to each other, and the inner edge of the first through hole 12 is provided with a first thread groove 1 2 1 opposite to the thread groove 0 1 and a first positioning is disposed at each end of the first hole 12 a first return hole 13 is connected between the first positioning groove 12 2 and the first positioning groove 1 2 2; a second nut 2 is disposed on the first The nut 1 is received in the hole 1 1 and is disposed in the long axis 0. The second nut 2 is provided with an annular protrusion 2 at an outer end and a first portion a second through hole 2 2, the outer edge of the protrusion 2 is provided with an external thread 2 1 , and the inner edge of the second through hole 2 2 is provided with a second thread groove 2 2 2 opposite to the thread groove 1 a second positioning slot 2 2 2 is disposed at each end of the two through holes 2 2 , and a second return hole (not shown) connecting the two positioning grooves 2 2 is disposed between the second positioning slots 2 2 1 ; a plurality of rolling elements X are interposed between the first thread groove 2丄 and the thread groove 0 1 and the second thread groove 2 2 2 and the thread groove 1; a plurality of reflow elements 4 are respectively installed in the first A positioning slot i 2 2 and a first positioning slot 2 2 1 ' are provided with a return path (not shown). The two ends of the return passage (not shown) of the reflow element 4 mounted on the first nut 1 are respectively connected to the first return hole 13 and the first thread groove 112, and are installed. The two ends of the return passage (not shown) of the reflow element 4 on the second nut 2 are coupled to the two ends of the second return hole (not shown) and the second thread groove 2 2 2 to make the first thread The groove 1 2 1 and the second thread groove 2 2 2 form a closed loop for providing the rolling element X for infinite circulation. An adjusting member 3, the inner edge of which is provided with an internal thread 3 1 opposite to the external thread 2 1 1 of the projection 2 1 , and the internal thread 3 1 and the external thread 2 ^^ are screwed together to make the adjusting member 3 can be screwed on the second block 2 of the second nut 2, and the outer edge of the stencil 3 is provided with a plurality of grooves 32 for providing a hand tool to facilitate the user to adjust the pre-pressure. The above description is a detailed description of each component and its mutual relationship. The following describes the embodiment of the present embodiment: As shown in the ninth and tenth drawings, the second nut 2 is disposed on the first, the capacity of the cap 1. The protrusion 21 in the hole 11 and the protrusion 21 of the second nut 2 can be completely exposed (as shown in FIG. 9) or partially exposed (as shown in FIG. 10). The outer end surface of the head-nut 1 is screwed together with the internal thread 3 i of the adjusting member 3 by the completely (or partially) exposed projection 1353391 1 2 and the inner thread 3 i of the adjusting member 3, and the inner side of the adjusting member 3 is screwed After the end face is screwed to the end face of the first nutper', and the second nut 2 generates a pulling force F, the inner screw of the two screw caps (refer to the first nut and the second nut) is rolled. The workpiece 产生 generates a (four) force with the first thread groove 1 2 1 and the thread groove Q 1 and the second thread groove 2 2 2 and the thread groove 0 1 , respectively, when the adjusting member 3 is further oriented in the direction of the first nut i The greater the pre-pressure generated, the smaller the pre-pressure generated when the adjusting member 3 is loosened in the reverse direction. In view of the above, in order to make the pre-pressure of the roller screw of the square money user, the adjustment structure is specially designed on the end of the nut to be installed on the machine table, and the pressure can be easily adjusted, and the conventional adjustment pre-pressure is improved. The problem is that the "industry availability" of the present invention should be unquestionable. In addition, the feature technology disclosed in the embodiment of the present invention has not been seen in publications before, and has not been publicly used. 'There is not only the fact that the effect is improved as described above, but also the additional effect that cannot be neglected'. Therefore, the "new reliance" and "progressiveness" of the present invention have met the patent law and applied for an invention patent. Hui--After reviewing and granting patents as soon as possible, it is really sensible. The above description of the embodiments is intended to be illustrative of the invention, and is not intended to limit the invention, so that variations in values and substitutions of equivalent elements are still subject to the scope of the invention.
13 1335391 【圖式簡單說明】 第-圖為習知技術具預壓力之滾珠螺桿立體圖。 第二圖為為本發明具可調整預壓力之螺帽組立圖。 第二圖為本發明第一螺帽立體圖。 第四圖為本發明第二螺帽立體圖。13 1335391 [Simple description of the diagram] The first figure is a perspective view of a ball screw with a pre-pressure of the prior art. The second figure is a vertical view of the nut assembly with adjustable preload in the present invention. The second figure is a perspective view of the first nut of the present invention. The fourth figure is a perspective view of the second nut of the present invention.
第五圖為本發明調整件立 第六圖為本發明具可調整_力之螺帽半剖視圖。 第七圖為本發明具可調整預壓力之螺帽部分剖視圖。 第八圖為本發明第二實施例具可調整預 部分剖視圖。 系中目 調整預壓力之滾珠螺桿之元件 弟九0為本發明具可 相互關聯圖。The fifth figure is an adjustment member of the present invention. The sixth figure is a half cross-sectional view of the nut with adjustable _ force according to the present invention. Figure 7 is a cross-sectional view of a portion of the nut of the present invention having an adjustable preload. Figure 8 is a cross-sectional view showing an adjustable partial portion of a second embodiment of the present invention. The element of the ball screw for adjusting the pre-pressure is the cross-correlation diagram of the present invention.
第十圖為本發明第二實施例具可調整預壓力 螺桿之元件相互關聯圖。 之滾珠 14 1335391 【主要元件符號說明】 習知技術： Ο A 螺桿 • 1 A、2 A 螺帽 3 A 預壓片 11A、21A、31A 鍵槽 4 A 鍵 • 本發明： 0 長軸 0 1 螺紋槽 1 第一 螺帽 1 1 容置孔 1 2 第 一穿孔 1 2 1 第一螺紋溝 1 2 2 第一定位槽 1 3 第一迴流孔 2 第二 螺帽 2 1 凸塊 2 1 1 外螺紋 2 2 第二穿孔 2 2 1 第二定位槽 2 2 2 第二螺紋溝 3 調整件 3 1 内螺紋 3 2 凹槽 4 迴流元件 X 滾動件 F 拉力Figure 11 is a cross-sectional view showing the components of an adjustable pre-pressure screw according to a second embodiment of the present invention. Ball 14 1335391 [Explanation of main component symbols] Conventional technology: Ο A screw • 1 A, 2 A nut 3 A Pre-pressed piece 11A, 21A, 31A Keyway 4 A key • The present invention: 0 Long axis 0 1 Thread groove 1 first nut 1 1 receiving hole 1 2 first perforation 1 2 1 first thread groove 1 2 2 first positioning groove 1 3 first return hole 2 second nut 2 1 bump 2 1 1 external thread 2 2 Second perforation 2 2 1 Second positioning groove 2 2 2 Second thread groove 3 Adjustment piece 3 1 Internal thread 3 2 Groove 4 Reflow element X Rolling element F Pulling force